Axial force measuring system and axial force measuring method

Abstract

The invention discloses an axial force measurement system and an axial force measurement method, and the system comprises an under-frame measurement device which is used for determining a relation coefficient corresponding to a to-be-measured calibration rod piece, the relation coefficient is a standard mapping relation between a standard axial force corresponding to the to-be-measured calibration rod piece and a standard torque corresponding to the to-be-measured calibration rod piece, and the to-be-measured calibration rod piece is a rod piece which is not fixedly installed on the aircraft cabin door; and the on-rack measuring device is in communication connection with the under-rack measuring device and is used for determining a target axial force corresponding to a to-be-measured target rod piece according to the standard mapping relation and the target torque, and the to-be-measured target rod piece is a rod piece fixedly installed on the aircraft cabin door. According to the technical scheme, firstly, the to-be-measured calibration rod piece is measured to determine the corresponding relation coefficient, then the target axial force corresponding to the to-be-measured target rod piece is determined by combining the target torque and the relation coefficient, and the accuracy and convenience of determining the axial force can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft, and particularly to an axial force measurement system and an axial force measurement method. Background Art

[0002] The structure of an aircraft door is usually relatively complex. When analyzing the influencing factors of the handle force during the process of lifting the door, it is necessary to obtain the force conditions of each key rod during the door lifting process. In related technologies, the measurement of the force conditions of rods mainly includes invasive measurement methods and non-invasive measurement methods.

[0003] For invasive measurement methods, due to the particularity of the aircraft door, the rod cannot be disassembled and damaged during the measurement process, and the aircraft door has a compact structure, and the internal space usually does not allow the placement of mechanical structures with a large volume. Therefore, there are measurement limitations.

[0004] For non-invasive measurement methods, they mainly include the strain method, the ultrasonic method, or the fiber Bragg grating method. Non-invasive measurement still has measurement errors, and the factors causing the measurement errors include the vibration of the rod and the pre-tightening force generated after the rod is installed.

[0005] Specifically, for the measurement error caused by the pre-tightening force, since an initial value of the pre-tightening force will be generated after the rod is installed on the door, and the initial value of the pre-tightening force is basically non-zero throughout the process of opening and closing the door, the axial force obtained by the above non-invasive measurement method can only reflect the change amount of the pre-tightening force corresponding to the rod, and cannot measure the absolute value of the pre-tightening force including the initial value of the pre-tightening force. Therefore, the measurement result has an error. i

[0006] Therefore, in related technologies, the measurement of the force on the rod of the aircraft door still has the defects of low measurement accuracy and cumbersome measurement process. Summary of the Invention

[0007] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to improve the accuracy and convenience of measuring a to-be-measured rod.

[0008] In order to solve at least one of the above-mentioned technical problems, the present invention discloses an axial force measurement system and an axial force measurement method.

[0009] According to one aspect of the present application, there is provided an axial force measurement system, including:

[0010] An under-frame measurement device for determining a relationship coefficient corresponding to a to-be-measured calibration rod, where the relationship coefficient is a standard mapping relationship between the standard axial force corresponding to the to-be-measured calibration rod and the standard torque corresponding to the to-be-measured calibration rod, and the to-be-measured calibration rod is a rod not fixedly installed on the aircraft door;

[0011] An on-rack measuring device, communicatively connected to the under-rack measuring device, is configured to determine a target axial force corresponding to a target rod to be measured according to the standard mapping relationship and a target torque, where the target rod to be measured is a rod fixedly installed on the aircraft cabin door.

[0012] Optionally, the under-rack measuring device includes:

[0013] A fixing structure for fixing the calibration rod to be measured, such that the axis of the calibration rod to be measured is parallel to the surface of the fixing structure;

[0014] An axial force loading structure, fixed to the fixing structure, for providing the standard axial force to the calibration rod to be measured;

[0015] A first torque loading structure, fixed to the fixing structure, for measuring the standard torque generated by the calibration rod to be measured under the action of the standard axial force;

[0016] A first data processing unit, fixed to the fixing structure and coupled to the axial force loading structure and the first torque loading structure respectively, for obtaining and calculating the standard mapping relationship.

[0017] Optionally, the axial force loading structure includes:

[0018] An actuator for providing and measuring the standard axial force to the calibration rod to be measured;

[0019] An adjustment bracket having a first part and a second part, where the first part is connected to the surface of the fixing structure, and the second part is connected to the first part and perpendicular to the surface of the fixing structure;

[0020] First fixing members respectively disposed on the actuator and the adjustment bracket, where the first fixing members are configured to connect the two ends of the calibration rod to be measured to the actuator and the adjustment bracket respectively;

[0021] An actuator bracket, with one end connected to the surface of the fixing structure and the other end connected to the actuator.

[0022] Optionally, the first torque loading structure includes:

[0023] A first driving motor for providing the standard torque to the calibration rod to be measured;

[0024] A first torque sensor, connected to the first driving motor, for measuring the standard torque;

[0025] The first vertical coupling, having a third part and a fourth part, the third part being connected to the first torque sensor, the fourth part being connected to the third part and perpendicular to the surface of the fixed structure, the first vertical coupling being used to adjust the transmission direction of the standard torque;

[0026] The second torque sensor, connected to the fourth part, for measuring the standard torque transmitted by the first vertical coupling;

[0027] The first connecting member, the center of the first connecting member being connected to the second torque sensor;

[0028] The first actuating assembly, including a first actuating link and a second actuating link respectively disposed at two ends of the first connecting member, for transmitting the standard torque to the to-be-tested calibration member and driving the to-be-tested calibration member to move;

[0029] The second fixing member, having two ends respectively connected to the first actuating link and the second actuating link, for clamping the to-be-tested calibration member and receiving the standard torque.

[0030] Optionally, the to-be-tested calibration member, the axial force loading structure, the first torque loading structure, and the first data processing unit are respectively detachably connected to the fixed structure.

[0031] Optionally, the on-frame measuring device includes:

[0032] The second torque loading structure, for providing the target torque for the to-be-tested target member;

[0033] The second data processing unit, for storing the standard mapping relationship and determining the target axial force according to the target torque and the standard mapping relationship.

[0034] Optionally, the on-frame measuring device further includes:

[0035] A display screen, communicatively connected to the second data processing unit, for displaying the torque value corresponding to the target torque and the axial force value of the target axial force corresponding to the target torque.

[0036] Optionally, the second torque loading structure includes:

[0037] A second driving motor, for providing the target torque for the to-be-tested target member;

[0038] A third torque sensor, connected to the second driving motor, for measuring the target torque;

[0039] A second vertical coupling, having a fifth part and a sixth part, wherein the fifth part is connected to the third torque sensor, and the sixth part is connected to the fifth part and perpendicular to the axial direction of the third torque sensor, and the second vertical coupling is used to adjust the transmission direction of the target torque;

[0040] A fourth torque sensor, connected to the sixth part, for measuring the target torque transmitted by the second vertical coupling;

[0041] A second connecting member, the center of which is connected to the fourth torque sensor;

[0042] A second actuating assembly, including a third actuating link and a fourth actuating link respectively disposed at two ends of the second connecting member, for transmitting the target torque to the target member to be measured and driving the target member to be measured to move;

[0043] A third fixing member, with two ends respectively connected to the third actuating link and the fourth actuating link, for clamping the target member to be measured and receiving the target torque.

[0044] Optionally, the on-frame measuring device further includes a device fixing member, and the device fixing member includes:

[0045] A pressing structure, including a first pressing plate, a second pressing plate and a locking assembly; the first pressing plate and the second pressing plate are opposed to each other, and the distance between the first pressing plate and the second pressing plate is adjusted and fixed through the locking assembly;

[0046] A flexible connecting rod, for adjusting the position of the second torque loading structure relative to the pressing structure.

[0047] Optionally, the on-frame measuring device further includes an outer housing,

[0048] A plurality of holes are provided on the outer housing, so that the fourth torque sensor and the display screen are exposed from the plurality of holes.

[0049] According to a second aspect of the present application, there is provided an axial force measuring method, applied to the axial force measuring system as described in any one of the above items, including:

[0050] Determine a target member to be measured from the aircraft cabin door, and obtain the corresponding standard mapping relationship of the target member to be measured;

[0051] Connect the second torque loading structure in the on-frame measuring device to the target member to be measured, and connect the device fixing member to the fixing component on the aircraft cabin door;

[0052] Provide a target torque for the target member to be measured through the second torque loading structure;

[0053] Determine the target axial force of the target rod to be measured according to the target torque and the target mapping relationship.

[0054] Optionally, determining the target rod to be measured on the cabin door of the slave aircraft and obtaining the corresponding standard mapping relationship of the target rod to be measured includes:

[0055] Determine the target rod to be measured;

[0056] Search for the corresponding standard mapping relationship of the target rod to be measured to obtain a data search result;

[0057] When the data search result indicates that the target rod to be measured has a corresponding standard mapping relationship, obtain the standard mapping relationship.

[0058] Optionally, the method further includes:

[0059] When the data search result indicates that the target rod to be measured does not have a corresponding standard mapping relationship, obtain the standard mapping relationship; the method for obtaining the standard mapping relationship includes:

[0060] Determine the calibration rod to be measured corresponding to the target rod to be measured from multiple rods;

[0061] According to the dimensions of the calibration rod to be measured, respectively determine the positions of the calibration rod to be measured, the axial force loading structure, the first torque loading structure, and the first data processing unit on the fixed structure;

[0062] Provide multiple standard axial forces for the calibration rod to be measured through the axial force loading structure, and determine multiple standard torques corresponding to the multiple standard axial forces through the first torque loading structure;

[0063] Determine the standard mapping relationship corresponding to the calibration rod to be measured according to the first data processing unit, the multiple standard axial forces, and the multiple standard torques;

[0064] Determine the standard mapping relationship corresponding to the calibration rod to be measured as the standard mapping relationship of the target rod to be measured.

[0065] In the axial force measurement system according to the embodiments of the present application, it includes an under-frame measurement device and an on-frame measurement device. Before the rod member is installed on the aircraft door, it is used as a to-be-measured calibration rod member, and the under-frame measurement device is used to measure the standard torque and the standard axial force applied to it to determine the relationship coefficient between the standard axial force and the standard torque, which can improve the convenience of determining the relationship coefficient corresponding to the to-be-measured calibration rod member. Further, the relationship coefficient is sent to the on-frame measurement device so that the on-frame measurement device can determine the target axial force corresponding to the to-be-measured target rod member according to the relationship coefficient and the target torque. Since the to-be-measured target rod member is the rod member installed on the aircraft door, through the above technical features, the target axial force can be determined without disassembling the to-be-measured target rod member, thereby improving the convenience and accuracy of determining the target axial force corresponding to the to-be-measured target rod member.

[0066] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for use in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0068] In order to more fully understand the present application and its beneficial effects, the following description will be made in conjunction with the drawings, in which the same reference numerals represent the same parts in the following description.

[0069] Figure 1 It is a system architecture diagram of the axial force measurement system provided by an exemplary embodiment of the present disclosure;

[0070] Figure 2 It is a first trend change diagram corresponding to the linear coefficient relationship provided by an exemplary embodiment of the present disclosure;

[0071] Figure 3 It is a second trend change diagram corresponding to the linear coefficient relationship provided by an exemplary embodiment of the present disclosure;

[0072] Figure 4 It is a structural schematic diagram of the under-frame measurement device provided by an exemplary embodiment of the present disclosure;

[0073] Figure 5 It is a structural schematic diagram of the to-be-measured calibration rod member provided by an exemplary embodiment of the present disclosure;

[0074] Figure 6 It is a structural schematic diagram of the axial force loading structure provided by an exemplary embodiment of the present disclosure;

[0075] Figure 7 Schematic structural diagram of the torque loading structure provided by an exemplary embodiment of the present disclosure;

[0076] Figure 8 Schematic structural diagram of the on-shelf measuring device provided by an exemplary embodiment of the present disclosure;

[0077] Figure 9 Schematic connection diagram of the second data processing unit provided by an exemplary embodiment of the present disclosure;

[0078] Figure 10 Schematic structural diagram of the outer housing provided by an exemplary embodiment of the present disclosure;

[0079] Figure 11 Schematic structural diagram of the device fixing member provided by an exemplary embodiment of the present disclosure;

[0080] Figure 12 Schematic flow chart corresponding to the axial force measurement method provided by an exemplary embodiment of the present disclosure;

[0081] Figure 13 Schematic flow chart I corresponding to the relationship determination provided by an exemplary embodiment of the present disclosure;

[0082] Figure 14 Schematic flow chart II corresponding to the relationship determination provided by an exemplary embodiment of the present disclosure;

[0083] Figure 15 Schematic flow chart I corresponding to the rod measurement provided by an exemplary embodiment of the present disclosure;

[0084] Figure 16 Schematic flow chart II corresponding to the rod measurement provided by an exemplary embodiment of the present disclosure.

[0085] Description of reference numerals:

[0086] 100 - Under-shelf measuring device, 110 - Fixing structure, 120 - Axial force loading structure, 121 - Actuator, 122 - Adjusting bracket, 1221 - First part, 1222 - Second part, 123 - First fixing member, 124 - Actuator bracket, 130 - First torque loading structure, 131 - First driving motor, 132 - First torque sensor, 133 - First vertical coupling, 1331 - Third part, 1332 - Fourth part, 134 - Second torque sensor, 135 - First connecting member, 136 - First actuating assembly, 1361 - First actuating link, 1362 - Second actuating link, 137 - Second fixing member, 138 - Positioning member, 140 - First data processing unit;

[0087] 200 - Calibration rod to be measured;

[0088] 300 - Measuring device on the rack, 310 - Second torque loading structure, 311 - Second driving motor, 312 - Third torque sensor, 313 - Second vertical coupling, 3131 - Fifth part, 3132 - Sixth part, 314 - Fourth torque sensor, 315 - Second connecting piece, 316 - Second actuating assembly, 3161 - Third actuating connecting rod, 3162 - Fourth actuating connecting rod, 317 - Third fixing piece, 320 - Second data processing unit, 330 - Display screen, 340 - Device fixing piece, 341 - Pressing structure, 3411 - First pressing plate, 3412 - Second pressing plate, 3413 - Locking assembly, 342 - Flexible connecting rod, 3421 - Connecting part, 3422 - Flexible rod, 350 - Outer housing, 351 - Hole, 3511 - Display screen mounting hole, 3512 - Transmission shaft outlet, 3513 - Battery cover, 3514 - Battery;

[0089] 400 - Target rod to be measured. Detailed implementation manner

[0090] Next, the technical solutions in the embodiments of this specification will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0091] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above accompanying drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or server including a series of steps or units does not necessarily have to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0092] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0093] The special term "exemplary" here means "serving as an example, embodiment or illustration". Any embodiment described here as "exemplary" does not have to be construed as superior or better than other embodiments.

[0094] As used herein, the term "and / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the term "at least one" as used herein means any one of a plurality or any combination of at least two of a plurality. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set composed of A, B, and C.

[0095] In addition, for a better illustration of the present disclosure, numerous specific details are given in the following specific embodiments. Those skilled in the art should understand that the present disclosure can also be implemented without certain specific details. In some instances, methods, means, elements, and circuits well-known to those skilled in the art are not described in detail to highlight the gist of the present disclosure.

[0096] In the related art, the measurement methods of the axial force of aircraft cabin door rods are mainly divided into two categories: invasive and non-invasive. The invasive measurement method is to directly implant a tensile sensor inside the rod to make it a part of the rod, so as to measure the axial force. However, this method requires reserving a sensor installation position at the rod design stage, which may not only damage the overall structure of the rod, but also increase the complexity and inconvenience of measurement.

[0097] The non-invasive measurement methods include the strain method, the ultrasonic method, and the fiber Bragg grating method. The measurement accuracy of the strain method is not only affected by the magnitude of the axial force, but also by the material, structure, and installation state of the rod; while both the ultrasonic method and the fiber Bragg grating method are affected by the environmental temperature, thus resulting in an impact on the measurement accuracy. In addition, since an initial pre-tightening force value will be generated after the rod is installed on the cabin door, the measurement methods of the axial force of aircraft cabin door rods in the related art are all to measure the relative axial force, that is, only including the change amount of the pre-tightening force, and the initial pre-tightening force value generated after the rod is installed cannot be taken into account in the measurement result.

[0098] In summary, various non-invasive methods all have certain limitations in practical applications, making it challenging to accurately measure the axial force of aircraft cabin door rods.

[0099] Compared with the defects in the related technologies, such as cumbersome measurement, damage to the rod structure, and low measurement accuracy, the axial force test system disclosed in the present invention can realize the on-line measurement and accurate measurement of the axial force of the hatch rod by using the relationship coefficient provided by the on-rack measuring device 300 in combination with the off-rack measuring device 100. At the same time, using the on-rack measuring device 300 to measure the hatch rod does not require damaging the structure of the hatch rod itself, and can measure the initial value of the pre-tightening force when the hatch rod is installed on the aircraft hatch, that is, the measured absolute axial force includes the initial value of the pre-tightening force and the change in the pre-tightening force, so as to avoid the influence of the pre-tightening force on the measurement result. Therefore, the axial force test system disclosed in the present invention is not restricted by the environment, rod size, etc., and has the advantages of on-line measurement, non-invasive measurement, and absolute measurement.

[0100] Figure 1 FIG. is a system architecture diagram of an axial force measurement system provided for an exemplary embodiment of the present disclosure, as Figure 1 shown, an axial force measurement system includes:

[0101] An off-rack measuring device 100, configured to determine a relationship coefficient corresponding to a to-be-tested calibration rod 200, where the relationship coefficient is a standard mapping relationship between the standard axial force corresponding to the to-be-tested calibration rod 200 and the standard torque corresponding to the to-be-tested calibration rod 200, and the to-be-tested calibration rod 200 is a rod not fixedly installed on the aircraft hatch;

[0102] An on-rack measuring device 300, communicatively connected to the off-rack measuring device 100, configured to determine a target axial force corresponding to a to-be-tested target rod 400 according to the standard mapping relationship and a target torque, where the to-be-tested target rod 400 is a rod fixedly installed on the aircraft hatch.

[0103] In a specific embodiment, the axial force measurement system may include an on-rack measuring device 300 and an off-rack measuring device 100. Among them, the off-rack measuring device 100 may include a fixed structure 110, a first torque loading structure 130, an axial force loading structure 120, and a first data processing unit 140. The off-rack measuring device 100 is configured to measure the relationship coefficient corresponding to a rod not installed on the aircraft hatch; the on-rack measuring device 300 may include a device fixing member 340, a second torque loading structure 310, and a second data processing unit 320. The on-rack measuring device 300 is configured to measure the target axial force corresponding to a rod installed on the aircraft hatch in combination with the relationship coefficient, so as to realize the measurement of the axial force of the rod.

[0104] Specifically, there is a corresponding relationship between the calibration rod 200 to be measured and the target rod 400 to be measured. For the same rod, when it is not installed on the aircraft door and needs to be measured, it becomes the calibration rod 200 to be measured. When it is installed on the aircraft door and needs to be measured, it becomes the target rod 400 to be measured. That is, it can be considered that the calibration rod 200 to be measured and the target rod 400 to be measured are rods of the same specification, with different names corresponding to different measurement scenarios. Among them, rods with the same relationship coefficient can be considered as rods of the same specification.

[0105] The relationship coefficient is used to reflect the mapping relationship between the axial force and the torque received by a rod. The standard mapping relationship obtained by measuring the standard axial force and the standard torque corresponding to the calibration rod 200 to be measured is the relationship coefficient corresponding to the calibration rod 200 to be measured and / or the target rod 400 to be measured.

[0106] Specifically, Figure 2 is the first trend change diagram corresponding to the linear coefficient relationship provided by the exemplary embodiment of the present disclosure. Figure 3 is the second trend change diagram corresponding to the linear coefficient relationship provided by the exemplary embodiment of the present disclosure. Please refer to Figure 2 and Figure 3 , it can be seen that for a rod, there is a linear relationship between its axial force and torque. Therefore, when one of the axial force and torque is known, the other value can be determined through the relationship coefficient. Specifically, for the determination of the relationship coefficient between the torque and axial force of the rod, it can be obtained by applying different torques and axial forces to the same rod multiple times and then performing calculations.

[0107] Figure 4 is the structural schematic diagram of the under-frame measuring device provided by the exemplary embodiment of the present disclosure. As Figure 4 shown, the under-frame measuring device 100 includes:

[0108] A fixing structure 110, which is used to fix the calibration rod 200 to be measured, so that the axis of the calibration rod 200 to be measured is parallel to the surface of the fixing structure 110;

[0109] An axial force loading structure 120, which is fixed on the fixing structure 110 and is used to provide a standard axial force for the calibration rod 200 to be measured;

[0110] A first torque loading structure 130, which is fixed on the fixing structure 110 and is used to measure the standard torque generated by the calibration rod 200 to be measured under the action of the standard axial force;

[0111] A first data processing unit 140, which is fixed on the fixing structure 110 and is respectively coupled to the axial force loading structure 120 and the torque loading structure, and is used to obtain and calculate the standard mapping relationship.

[0112] The calibration rod 200 to be measured, the axial force loading structure 120, the first torque loading structure 130, and the first data processing unit 140 are respectively detachably connected to the fixed structure 110.

[0113] In a specific embodiment, the under-frame measuring device 100 may include a fixed structure 110, an axial force loading structure 120, a first torque loading structure 130, and a first data processing unit 140. Among them, the axial force loading structure 120, the first torque loading structure 130, and the first data processing unit 140 are detachably connected to the fixed structure 110. When the size of the calibration rod 200 to be measured changes, the positions of the axial force loading structure 120, the first torque loading structure 130, and the first data processing unit 140 on the fixed structure 110 can be adjusted, so that the under-frame measuring device 100 can adapt to calibration rods 200 of different sizes, thereby improving the application flexibility and scenario adaptability of the axial force measurement system.

[0114] Specifically, the fixed structure 110 is usually made of high-strength materials to ensure the stability of the positions and states of the calibration rod 200 to be measured and the structures in the under-frame measuring device 100 during the measurement process. And it can be spliced with other fixed structures 110 to realize the expansion of size.

[0115] On the fixed structure 110, the axial force loading structure 120 cooperates with the first torque loading structure 130 to fixedly clamp the calibration rod 200 to be measured and drive the calibration rod 200 to move. At the same time, the first torque loading structure 130 and the axial force loading structure 120 are coupled to the first data processing unit 140, for example, connected by electrical connection, communication connection, etc., to receive the standard axial force and standard torque corresponding to the calibration rod 200 to be measured, so as to calculate the standard mapping relationship corresponding to the calibration rod 200 to be measured, so as to realize the determination of the relationship coefficient.

[0116] Figure 5 It is a schematic structural diagram of the calibration rod to be measured provided by an exemplary embodiment of the present disclosure; the calibration rod 200 to be measured can be any rod that can be installed on the aircraft door, for example, a lifting mechanism link, a torsion bar link, a latch mechanism link, a pressure prevention door link, etc. Please refer to Figure 5 As an exemplary rod, Figure 5 the rod in can be either the calibration rod 200 to be measured or become the target rod 400 to be measured after being installed on the door. Among them, the lengths of the calibration rod 200 to be measured and the target rod 400 to be measured can both be adjusted. At the same time, due to the change in the length of the rod, during the process of applying torque to it by the under-frame measuring device 100, the axial force obtained will also change due to the change in the length of the rod. As shown in Figure 5As shown, adjusting ends are respectively provided at both ends of the calibration rod 200 to be measured, and the adjusting ends can adjust the rod length of the calibration rod 200 to be measured by adjusting the rod end nuts.

[0117] Figure 6 The following is a schematic structural diagram of the axial force loading structure provided by an exemplary embodiment of the present disclosure. As Figure 6 shown, the axial force loading structure 120 includes:

[0118] An actuator 121 for providing and measuring a standard axial force for the calibration rod 200 to be measured;

[0119] An adjusting bracket 122 having a first part 1221 and a second part 1222. The first part 1221 is connected to the surface of the fixed structure 110, and the second part 1222 is connected to the first part 1221 and perpendicular to the surface of the fixed structure 110;

[0120] First fixing members 123 respectively disposed on the actuator 121 and the adjusting bracket 122. The first fixing members 123 are used to respectively connect both ends of the calibration rod 200 to be measured to the actuator 121 and the adjusting bracket 122;

[0121] An actuator bracket 124 having one end connected to the surface of the fixed structure 110 and the other end connected to the actuator 121.

[0122] In a specific embodiment, the axial force loading structure 120 can apply an axial force to the calibration rod 200 to be measured by means of hydraulic pressure, machinery, etc., and the actuator 121 can be used to provide a standard axial force for the calibration rod 200 to be measured. The actuator 121 may include one of a hydraulic cylinder, a linear motor, a combination of a motor and a turbine worm, etc. as the axial force source; the actuator 121 also includes a built-in pressure sensor for measuring the standard axial force, so that the application of the axial force has high precision. The actuator 121 is coupled to the first data processing unit 140 to realize the transfer of the standard axial force to the first data processing unit 140.

[0123] The axial force loading mechanism further includes an actuator bracket 124, an adjusting bracket 122, and a first fixing member 123. The actuator bracket 124 and the adjusting bracket 122 may be L-shaped structures. One end of the actuator bracket 124 is connected to the surface of the fixed structure 110, and the other end is connected to the actuator 121, so that the actuator 121 can be stably fixed to the fixed structure 110; the adjusting bracket 122 has a first part 1221 and a second part 1222. Its first part 1221 is connected to the surface of the fixed structure 110, and the second part 1222 is connected to the first part 1221 and perpendicular to the surface of the fixed structure 110.

[0124] For the first fixing member 123, the number thereof is two, which are respectively arranged on the second part 1222 of the actuator 121 and the adjusting bracket 122, so that the calibration component to be measured can be connected between the actuator 121 and the adjusting bracket 122, and the axial direction of the calibration component to be measured is parallel to the surface of the fixing structure 110.

[0125] Figure 7 The structural schematic diagram of the torque loading structure provided by the exemplary embodiment of the present disclosure is as Figure 7 shown. The first torque loading structure 130 includes:

[0126] A first driving motor 131 for providing a standard torque for the calibration rod 200 to be measured;

[0127] A first torque sensor 132 connected to the first driving motor 131 for measuring the standard torque;

[0128] A first vertical coupling 133 having a third part 1331 and a fourth part 1332. The third part 1331 is connected to the first torque sensor 132, and the fourth part 1332 is connected to the third part 1331 and is perpendicular to the surface of the fixing structure 110. The first vertical coupling 133 is used to adjust the transmission direction of the standard torque;

[0129] A second torque sensor 134 connected to the fourth part 1332 for measuring the standard torque transmitted by the first vertical coupling 133;

[0130] A first connecting member 135, the center of the first connecting member 135 is connected to the second torque sensor 134;

[0131] A first actuating assembly 136 includes a first actuating link 1361 and a second actuating link 1362 respectively arranged at two ends of the first connecting member 135, which is used to transmit the standard torque to the calibration rod 200 to be measured and drive the calibration rod 200 to move;

[0132] A second fixing member 137, the two ends of which are respectively connected to the first actuating link 1361 and the second actuating link 1362, which is used to clamp the calibration rod 200 to be measured and receive the standard torque.

[0133] In a specific embodiment, the first torque loading structure 130 may include a first driving motor 131, a first torque sensor 132, a first vertical coupling 133, a second torque sensor 134, a first connecting member 135, a first actuating assembly 136 and a second fixing member 137.

[0134] Specifically, as Figure 4As shown, the first drive motor 131 can be connected to the fixed structure 110 through the positioning member 138, and there can be a gap between the remaining structures in the first torque loading structure 130 and the fixed structure 110. The first drive motor 131, the first torque sensor 132, the first vertical coupling 133, the first actuating link 1361, and the second actuating link 1362 can be arranged in a direction parallel to the surface of the fixed structure 110 along their axial directions, and the second torque sensor 134 can be arranged in a direction perpendicular to the surface of the fixed structure 110. After the calibration rod 200 to be measured is clamped by the second fixing member 137, the axial direction of the calibration rod 200 to be measured is perpendicular to the surface of the fixed structure 110.

[0135] The first torque sensor 132 can measure the initial torque provided by the first drive motor 131. When the initial torque changes direction along the first vertical coupling 133 and is transmitted to the second torque sensor 134, the second torque sensor 134 can measure the transmitted torque and perform correction by combining the transmitted torque and the initial torque, so as to obtain the standard torque. The setting of the two torque sensors can acquire and correct the deviation that occurs during the torque transmission process, and further improve the accuracy and reliability of the determination of the relationship coefficient.

[0136] During the measurement process, the first connecting member 135 is perpendicular to the surface of the fixed structure 110, and connecting the second torque sensor 134 to the center (also the axis center) of the first connecting member 135 can ensure that the standard torque is evenly transmitted to both ends of the calibration rod 200 to be measured, further improving the accuracy of the determination of the relationship coefficient.

[0137] Figure 8 The structural schematic diagram of the on-rack measuring device provided by the exemplary embodiment of the present disclosure is as Figure 8 shown. For the on-rack measuring device 300, it can include:

[0138] A second torque loading structure 310 for providing a target torque for the target rod 400 to be measured;

[0139] A second data processing unit 320 for storing the standard mapping relationship and determining the target axial force according to the target torque and the standard mapping relationship.

[0140] Wherein, the second torque loading structure 310 includes:

[0141] A second drive motor 311 for providing a target torque for the target rod 400 to be measured;

[0142] A third torque sensor 312 connected to the second drive motor 311 for measuring the target torque;

[0143] The second vertical coupling 313 has a fifth part 3131 and a sixth part 3132. The fifth part 3131 is connected to the third torque sensor 312. The sixth part 3132 is connected to the fifth part 3131 and is perpendicular to the axial direction of the third torque sensor 312. The second vertical coupling 313 is used to adjust the transmission direction of the target torque;

[0144] The fourth torque sensor 314 is connected to the sixth part 3132 and is used to measure the target torque transmitted by the second vertical coupling 313;

[0145] The second connecting member 315 has its center connected to the fourth torque sensor 314;

[0146] The second actuating assembly 316 includes a third actuating link 3161 and a fourth actuating link 3162 respectively disposed at both ends of the second connecting member 315, and is used to transmit the target torque to the target member 400 to be measured and drive the target member 400 to be measured to move;

[0147] The third fixing member 317 is connected to the third actuating link 3161 and the fourth actuating link 3162 at both ends respectively, and is used to clamp the target member 400 to be measured and receive the target torque.

[0148] In a specific embodiment, the on-rack measuring device 300 may be a hand-held measuring machine or other portable device including at least the second torque loading structure 310 and the second data processing unit 320. The hand-held structure is set to be light and easy to use, suitable for on-site measurement.

[0149] Since the off-rack measuring device 100 can measure the relationship coefficient between the standard torque and the standard axial force corresponding to the calibrated member 200 to be measured, it can be considered that the off-rack measuring device 100 has a guiding role in the axial force measurement and member adjustment of the target member 400 to be measured. According to the determined relationship coefficient and the calculated target axial force, it can be judged whether the target axial force of the target member 400 to be measured meets the application standard, and adjustment can be made when it does not meet the standard. Specifically, by using the on-rack measuring device 300 in combination with the relationship coefficient, the calculation of the target axial force can be realized when applying the target torque to the target member 400 to be measured. At the same time, it can also be judged whether the installation and force application of the target member 400 to be measured meet the application standard according to the calculation result of the target axial force corresponding to the target member 400 to be measured.

[0150] For the second torque loading structure 310, reference can be continued to Figure 7 , whose structure and working principle are the same as those of the first torque loading structure 130, and there are only differences in the installation method due to the differences between the on-rack measuring device 300 and the off-rack measuring device 100, so it will not be elaborated here.

[0151] For the second data processing unit 320, reference can be made to Figure 9 , inside the housing, the second data processing unit 320 is respectively connected to the display screen 330 and the battery 3514. In addition, the second data processing unit 320 is coupled to the first data processing unit 140 to receive and store the target torque and the relationship coefficient of the calibration rod 200 to be measured sent by the first data processing unit 140, and calculate the target axial force of the target rod 400 to be measured in combination with the relationship coefficient and the target torque.

[0152] In addition, as Figure 8 and Figure 9 shown, the on-rack measuring device 300 further includes a display screen 330, and the display screen 330 is communicatively connected to the second data processing unit 320 for displaying the torque value corresponding to the target torque and the axial force value of the target axial force corresponding to the target torque.

[0153] Specifically, the display screen 330 is a high-definition display screen 330, or it can be other display devices, which can be communicatively connected to the second data processing unit 320 and perform data exchange to display in real time data such as the torque value corresponding to the target torque, the relationship coefficient corresponding to the target rod 400 to be measured, and the axial force value of the target axial force.

[0154] Figure 10 The following is a schematic structural diagram of the housing provided by the exemplary embodiment of the present disclosure. Please refer to Figure 8 and Figure 10 , the on-rack measuring device 300 further includes a housing 350,

[0155] A plurality of holes 351 are provided on the housing 350 so that the fourth torque sensor 314 and the display screen 330 are exposed from the plurality of holes 351.

[0156] In a specific embodiment, the housing 350 is sleeved outside the second torque loading structure 310 and the second data processing unit 320, and a plurality of holes 351 are provided. The plurality of holes 351 may include a display screen mounting hole 3511 and a transmission shaft outlet 3512 so that the display screen 330, the second torque sensor 134 or the fourth torque sensor 314 can be exposed from the housing 350. In addition, a battery cover 3513 and connection holes not marked in the figure are further provided on the housing 350.

[0157] Figure 11 The following is a schematic structural diagram of the device fixing member provided by the exemplary embodiment of the present disclosure. Please refer to Figure 8 and Figure 11 , the on-rack measuring device 300 further includes a device fixing member 340, and the device fixing member 340 includes:

[0158] The pressing structure 341 includes a first pressing plate 3411, a second pressing plate 3412, and a locking assembly 3413; the first pressing plate 3411 and the second pressing plate 3412 are opposed to each other, and the distance between the first pressing plate 3411 and the second pressing plate 3412 is adjusted and fixed by the locking assembly 3413;

[0159] The flexible connecting rod 342 is used to adjust the position of the second torque loading structure 310 relative to the pressing structure 341.

[0160] In a specific embodiment, the pressing structure 341 includes a first pressing plate 3411, a second pressing plate 3412, and a locking assembly 3413. Other fixed components of the aircraft are placed in the distance between the first pressing plate 3411 and the second pressing plate 3412, and the locking assembly is adjusted so that the on-board measuring device 300 can be clamped and fixed to other fixed components of the aircraft through the device fixing member 340. Thus, during the axial force measurement of the to-be-tested target rod 400, the on-board measuring device 300 can stably clamp the to-be-tested target rod 400 without being affected by axial force or torque changes.

[0161] The flexible connecting rod 342 may include a connecting portion 3421 and a flexible rod 3422. The connecting portion 3421 is placed in the connecting hole on the outer housing 350 to realize the connection between the device fixing member 340 and the outer housing 350. Through the setting of the flexible connecting rod 342, after the on-board measuring device 300 is clamped to other fixed components of the aircraft, the angle can be arbitrarily adjusted, that is, the position of the second torque loading structure 310 relative to the pressing structure 341 can be adjusted, so as to better measure the target axial force of the to-be-tested target rod 400.

[0162] This application also discloses an axial force measurement method, which is applied to the axial force measurement system in any of the above embodiments, as Figure 12 shown, the method includes:

[0163] Step S101: Determine the to-be-tested target rod from the aircraft hatch and obtain the corresponding standard mapping relationship of the to-be-tested target rod;

[0164] In a specific embodiment, multiple rods are provided on the aircraft hatch. When measurement is required, first determine the to-be-tested target rod from the multiple rods and obtain the corresponding standard mapping relationship of the to-be-tested target rod, that is, determine the relationship coefficient between the axial force and the torque corresponding to the to-be-tested target rod.

[0165] Specifically, Figure 13 is the first flow chart corresponding to the relationship determination provided by the exemplary embodiment of the present disclosure; please refer to Figure 13 , determining the to-be-tested target rod from the aircraft hatch and obtaining the corresponding standard mapping relationship of the to-be-tested target rod includes:

[0166] Step S201: Determine the target rod to be measured.

[0167] Step S202: Search for the corresponding standard mapping relationship of the target rod to be measured to obtain a data search result.

[0168] Step S203: When the data search result indicates that the target rod to be measured has a corresponding standard mapping relationship, obtain the standard mapping relationship.

[0169] In a specific embodiment, after determining the target rod to be measured, first search in the second data processing unit of the on-rack measuring device to check if there is a corresponding standard mapping relationship with the target rod to be measured, and obtain a data search result.

[0170] Generally, the corresponding standard mapping relationships of the rods provided on the aircraft cabin door have been stored in the second data processing unit. When the data search result indicates that the target rod to be measured has a corresponding standard mapping relationship, directly obtain the standard mapping relationship from the second data processing unit.

[0171] In addition, Figure 14 For the second process schematic diagram corresponding to the relationship determination provided by this exemplary embodiment of the present disclosure, please refer to Figure 14 , when the data search result indicates that the target rod to be measured has a corresponding standard mapping relationship, the method for obtaining the standard mapping relationship includes:

[0172] Step S301: Determine the calibration rod to be measured with the same specifications as the target rod to be measured from multiple rods.

[0173] Step S302: According to the dimensions of the calibration rod to be measured, respectively determine the positions of the calibration rod to be measured, the axial force loading structure, the first torque loading structure, and the first data processing unit on the fixed structure.

[0174] Step S303: Provide multiple standard axial forces for the calibration rod to be measured through the axial force loading structure, and determine multiple standard torques corresponding to the multiple standard axial forces through the first torque loading structure.

[0175] Step S304: Determine the standard mapping relationship corresponding to the calibration rod to be measured according to the first data processing unit, multiple standard axial forces, and multiple standard torques.

[0176] Step S305: Determine the standard mapping relationship corresponding to the calibration rod to be measured as the standard mapping relationship of the target rod to be measured.

[0177] In a specific embodiment, when the second data processing unit does not exist or cannot obtain the standard mapping relationship corresponding to the target rod to be measured due to reasons such as data update or unit failure, the relationship coefficient of the target rod to be measured can be first determined by using the under-frame measuring device, that is, the standard mapping relationship between the standard axial force and the standard torque corresponding to the target rod to be measured. Among them, the calibration rod to be measured corresponding to the target rod to be measured is a rod of the same specification as the target rod to be measured and capable of realizing calibration.

[0178] Since the under-frame measuring device can adapt to rods of any size, the positions of the various structures of the under-frame measuring device on the fixed structure can be flexibly determined according to the size of the target rod to be measured, so that the target rod to be measured can be clamped and subjected to torque and axial force. Then, the first data processing unit determines the standard mapping relationship of the target rod to be measured and sends it to the second data processing unit.

[0179] Step S102: Connect the second torque loading structure in the on-frame measuring device to the target rod to be measured, and connect the device fixing part to the fixing part on the aircraft cabin door;

[0180] Step S103: Provide a target torque for the target rod to be measured through the second torque loading structure;

[0181] Step S104: Determine the target axial force of the target rod to be measured according to the target torque and the standard mapping relationship.

[0182] In a specific embodiment, the target rod to be measured is fixed to the third fixing part, and the device fixing part is clamped to other fixing parts on the aircraft cabin door to realize the fixation of the on-frame measuring device. Further, the second driving electrode is turned on to generate torque, and the torque is sequentially transmitted along the second torque loading structure, so that the target rod to be measured receives the target torque and moves, and the target torque is transmitted to the second data processing unit. Combining the standard mapping relationship corresponding to the target rod to be measured, the determination of the target axial force is realized.

[0183] In a specific embodiment, Figure 15 is the first process schematic diagram corresponding to the rod measurement provided by the exemplary embodiment of the present disclosure, Figure 16 is the second process schematic diagram corresponding to the rod measurement provided by the exemplary embodiment of the present disclosure. Please refer to Figure 15 and Figure 16 , for the axial force test system disclosed in the present invention, a complete test process may include the determination of the relationship coefficient of the calibration rod 200 to be measured and the calculation of the axial force of the target rod 400 to be measured.

[0184] Specifically, please refer to Figure 15, First, install the calibration rod 200 to be measured on the under-frame test device 100. Then, turn on the axial force loading structure 120 to provide the current axial force for the calibration rod 200 to be measured, and determine whether the current axial force is greater than the stage standard axial force. Herein, the standard axial force is the axial force that the rod receives when installed on the aircraft door under the standard state, and this data is obtained according to the debugging records of professionals during the installation process of the rod. The stage standard axial force is obtained by dividing the standard axial force into multiple axial forces according to specific calculation requirements. For example, if the standard axial force is 10 N, the stage standard axial force can be divided into 2 N, 4 N, 6 N, and 8 N. The main purpose of this is to obtain more axial force and torque data, thereby improving the accuracy of determining the relationship coefficient.

[0185] Furthermore, if the current axial force is less than the stage standard axial force, record the data and continue to apply axial force to the calibration rod 200 to be measured; if the current axial force is equal to the stage standard axial force, record the current axial force, use the first torque loading structure 130 to apply axial torque to the calibration rod 200 to be measured multiple times, and record the corresponding torque in real time. Continue to determine whether the current axial force is equal to the standard axial force. If it is less than the standard axial force, record the data and continue to apply axial force to the calibration rod 200 to be measured; if the current axial force is equal to the standard axial force, process the previously recorded axial force-torque data to calculate the corresponding relationship coefficient of the calibration rod 200 to be measured. Herein, to improve the accuracy of determining the relationship coefficient, the above operations can be repeated to measure the relationship coefficient of the calibration rod 200 to be measured multiple times, and then take the average value of multiple relationship coefficients as the final standard mapping relationship. A database can be constructed by combining the standard mapping relationships corresponding to each calibration rod 200 to be measured, which is convenient for the on-frame measuring device 300 to access the database and obtain the standard mapping relationship corresponding to the target rod 400 to be measured later.

[0186] Furthermore, please refer to Figure 16 , when after Figure 15 the relationship coefficient of the calibration rod 200 to be measured is solved through the process shown, when the calibration rod 200 to be measured is installed on the aircraft door, the calibration rod 200 to be measured is the target rod 400 to be measured.

[0187] As Figure 16 shown, when it is necessary to perform an axial force test on the target rod 400 to be measured installed on the aircraft door, that is, to perform an on-frame axial force test, first, it is necessary to determine whether the target rod 400 to be measured already has a relationship coefficient. If not, it is necessary to combine Figure 15The process shown calculates the relationship coefficient for the calibration rod 200 to be measured. If the relationship coefficient of the target rod 400 to be measured already exists, it is connected to the on - shelf test device 300, and torque is provided to it through the second torque loading structure 310, so as to determine the target axial force of the target rod 400 to be measured in combination with the relationship coefficient. It should be noted that since the length of the rod affects the axial force, the length of the target rod 400 to be measured needs to be considered during both measurement and calculation to ensure the accuracy of axial force measurement.

[0188] In another specific embodiment, for the batch - produced cabin doors and the cabin doors maintained by ground crew during the route operation stage, it is necessary to calibrate and adjust the axial forces corresponding to the rods installed on the cabin doors based on the standard axial forces of each rod.

[0189] In this application, in combination with the axial force measurement system, the axial force of the target rod to be measured installed on the aircraft cabin door is measured. Compared with the measurement methods such as the strain method and the ultrasonic method in the related art, it can be more accurate, more convenient and easier for relevant staff to operate, realize on - line measurement, and improve the measurement efficiency of the axial force.

[0190] In the description of this application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality" means two or more unless otherwise specifically defined.

[0191] In the above - mentioned embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0192] Among the embodiments, implementation manners and related technical features of this application, they can be combined and replaced with each other without conflict.

[0193] The above are the preferred embodiments of this application, and it is not intended to limit this application in any form. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application still belong to the scope of the technical solution of this application. The selection of terms used herein aims to best explain the principles of each embodiment, practical applications or improvements to technologies in the market, or enable other ordinary technicians in this technical field to understand the embodiments disclosed herein.

Claims

1. An axial force measurement system, characterized in that, The system includes: An under-frame measuring device for determining a relationship coefficient corresponding to a calibration rod to be measured, where the relationship coefficient is a standard mapping relationship between the standard axial force corresponding to the calibration rod to be measured and the standard torque corresponding to the calibration rod to be measured, and the calibration rod to be measured is a rod not fixedly installed on the aircraft door; An on-frame measuring device communicatively connected to the under-frame measuring device for determining a target axial force corresponding to a target rod to be measured according to the standard mapping relationship and a target torque, where the target rod to be measured is a rod fixedly installed on the aircraft door.

2. The axial force measurement system according to claim 1, wherein The under-frame measuring device includes: A fixing structure for fixing the calibration rod to be measured so that the axis of the calibration rod to be measured is parallel to the surface of the fixing structure; An axial force loading structure fixed to the fixing structure for providing the standard axial force to the calibration rod to be measured; A first torque loading structure fixed to the fixing structure for measuring the standard torque generated by the calibration rod to be measured under the action of the standard axial force; A first data processing unit fixed to the fixing structure and respectively coupled to the axial force loading structure and the first torque loading structure for obtaining and calculating the standard mapping relationship.

3. The axial force measurement system according to claim 2, characterized in that, The axial force loading structure includes: An actuator for providing and measuring the standard axial force to the calibration rod to be measured; An adjusting bracket having a first part and a second part, where the first part is connected to the surface of the fixing structure, and the second part is connected to the first part and perpendicular to the surface of the fixing structure; First fixing members respectively disposed on the actuator and the adjusting bracket, where the first fixing members are used to connect the two ends of the calibration rod to be measured to the actuator and the adjusting bracket respectively; An actuator bracket with one end connected to the surface of the fixing structure and the other end connected to the actuator.

4. The axial force measurement system according to claim 2, characterized in that, The first torque loading structure includes: A first driving motor for providing the standard torque to the calibration rod to be measured; A first torque sensor connected to the first driving motor for measuring the standard torque; A first vertical coupling having a third part and a fourth part, where the third part is connected to the first torque sensor, and the fourth part is connected to the third part and perpendicular to the surface of the fixing structure, and the first vertical coupling is used to adjust the transmission direction of the standard torque; A second torque sensor connected to the fourth part for measuring the standard torque transmitted by the first vertical coupling; A first connecting member, the center of which is connected to the second torque sensor; A first actuating assembly including a first actuating link and a second actuating link respectively disposed at both ends of the first connecting member for transmitting the standard torque to the calibration rod to be measured and driving the calibration rod to be measured to move; A second fixing member with both ends respectively connected to the first actuating link and the second actuating link for clamping the calibration rod to be measured and receiving the standard torque.

5. The axial force measurement system according to claim 2, characterized in that, The calibrated rod to be measured, the axial force loading structure, the first torque loading structure, and the first data processing unit are respectively detachably connected to the fixed structure.

6. The axial force measurement system according to claim 1, characterized in that, The on-frame measuring device includes: A second torque loading structure for providing the target torque to the target rod to be measured; A second data processing unit for storing the standard mapping relationship and determining the target axial force according to the target torque and the standard mapping relationship.

7. The axial force measurement system according to claim 6, wherein The on-frame measuring device further includes: A display screen communicatively connected to the second data processing unit for displaying the torque value corresponding to the target torque and the axial force value of the target axial force corresponding to the target torque.

8. The axial force measurement system according to claim 6, characterized in that, The second torque loading structure includes: A second driving motor for providing the target torque to the target rod to be measured; A third torque sensor connected to the second driving motor for measuring the target torque; A second vertical coupling having a fifth part and a sixth part, the fifth part being connected to the third torque sensor, the sixth part being connected to the fifth part and perpendicular to the axial direction of the third torque sensor, and the second vertical coupling being used to adjust the transmission direction of the target torque; A fourth torque sensor connected to the sixth part for measuring the target torque transmitted by the second vertical coupling; A second connecting member, the center of which is connected to the fourth torque sensor; A second actuating assembly including a third actuating link and a fourth actuating link respectively disposed at both ends of the second connecting member for transmitting the target torque to the target rod to be measured and driving the target rod to be measured to move; A third fixing member having both ends respectively connected to the third actuating link and the fourth actuating link for clamping the target rod to be measured and receiving the target torque.

9. The axial force measurement system according to claim 6, characterized in that The on-frame measuring device further includes a device fixing member, and the device fixing member includes: A pressing structure including a first pressing plate, a second pressing plate, and a locking assembly; the first pressing plate and the second pressing plate are opposed to each other, and the distance between the first pressing plate and the second pressing plate is adjusted and fixed by the locking assembly; A flexible connecting rod for adjusting the position of the second torque loading structure relative to the pressing structure.

10. The axial force measurement system according to claim 7, characterized in that, The on-frame measuring device further includes an outer housing, and a plurality of holes are provided on the outer housing so that the fourth torque sensor and the display screen are exposed from the plurality of holes.

11. An axial force measurement method, applied to the axial force measurement system according to any one of claims 1-10, characterized in that, The method includes: Determining the target rod to be measured from the aircraft cabin door and obtaining the standard mapping relationship corresponding to the target rod to be measured; Connecting the second torque loading structure in the on-frame measuring device to the target rod to be measured, and connecting the device fixing member to the fixing component on the aircraft cabin door; Providing a target torque to the target rod to be measured through the second torque loading structure; Determining the target axial force of the target rod to be measured according to the target torque and the standard mapping relationship.

12. The axial force measurement method according to claim 11, characterized in that, The determining the target rod to be measured from the aircraft cabin door and obtaining the standard mapping relationship corresponding to the target rod to be measured includes: Determining the target rod to be measured; Search for the corresponding standard mapping relationship of the target rod to be measured to obtain a data search result; When the data search result indicates that the target rod to be measured has a corresponding standard mapping relationship, obtain the standard mapping relationship.

13. The axial force measurement method according to claim 12, wherein, The method further includes: When the data search result indicates that the target rod to be measured does not have a corresponding standard mapping relationship, obtain the standard mapping relationship; the method for obtaining the standard mapping relationship includes: Determine a calibration rod to be measured corresponding to the target rod to be measured from multiple rods; According to the dimensions of the calibration rod to be measured, respectively determine the positions of the calibration rod to be measured, the axial force loading structure, the first torque loading structure, and the first data processing unit on the fixed structure; Provide multiple standard axial forces for the calibration rod to be measured through the axial force loading structure, and determine multiple standard torques corresponding to the multiple standard axial forces through the first torque loading structure; Determine the standard mapping relationship corresponding to the calibration rod to be measured according to the first data processing unit, the multiple standard axial forces, and the multiple standard torques; Determine the standard mapping relationship corresponding to the calibration rod to be measured as the standard mapping relationship of the target rod to be measured.

Images